If you want to know what people are saying about you on the Web, consider using these free online tools.
Blogdigger allows you to search, as well as subscribe to RSS feeds, on specific keywords
Boardtracker will track threads in forums and sends alerts on specific keywords
Google Alerts will send you e-mails on the keywords you select
Ice Rocket helps you find mentions of you on the Web that Google misses
Linqia lets you search thousands of online communities via keyword
Serph shows you what is being said about you across social media sites – in real time
Summize searches Twitter for specific keywords in real time
Technorati lets you search on keywords, or subscribe to specific tags via RSS
Twing lets you search for forums by posts, threads and topics
If I’ve missed any you think are great, please let me know.